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Parasitology > Bovine Arachnids > Flashcards

Bovine Arachnids Flashcards

1
Q

Amblyomma spp.-Common Name

A

Ixodid ticks–

Lone star tick, Gulf Coast tick, Tropical bont tick, Bont tick

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2
Q

Amblyomma spp.-Hosts

A

Humans, livestock, dogs, cats

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3
Q

Amblyomma spp.-Identification

A

Very long palps and hypostome, ornate, banded legs

A. americanum “lone star tick” has single white spot on female scutum

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4
Q

Amblyomma spp.-Life Cycle

A

ELNA

3 host tick, eggs in environ.

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5
Q

Amblyomma spp.-Site of Infection

A

Head, ears, and neck

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6
Q

Amblyomma spp.-Pathogenesis and Lesions/Clinical Signs

A

Long mouthparts = painful bites
Transmits diseases:
-Rickettsial (eg heartwater)
-Hepatozoon americanum by ingestion of A. meculatum

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7
Q

Amblyomma spp.-Diagnosis

A

Id tick

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8
Q

Amblyomma spp.-Treatment and Prevention

A

several parasiticides effective, difference if lactating dairy cattle

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9
Q

Rhipicephalus (Boophilus) spp.-Common Names

A

Blue tick or cattle tick
R. annulatus: cattle fever tick
R. microplus: tropical cattle tick

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10
Q

Rhipicephalus (Boophilus) spp.-Hosts

A

Cattle, other large hosts

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11
Q

Rhipicephalus (Boophilus) spp.-Identification

A

Hexagonal basis capituli, prominent dorsal ridges on palps, short hypostome/palps

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12
Q

Rhipicephalus (Boophilus) spp.-Life Cycle

A

ELNA
1 host tick
do fall off to lay eggs in the environ.

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13
Q

Rhipicephalus (Boophilus) spp.-Site of Infection

A

Adults on ventral aspects of body

Immatures on ears

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14
Q

Rhipicephalus (Boophilus) spp.-Pathogenesis and Lesions/Clinical Signs

A

Bovine piroplasmosis/Cattle fever: Babesia bigemina

Gallsickness: Anaplasma marginale

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15
Q

Rhipicephalus (Boophilus) spp.-Diagnosis

A

Id tick

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16
Q

Rhipicephalus (Boophilus) spp.-Treatment and Prevention

A

Parasiticides effective, difference if lactating dairy cattle
Suspected tick are submitted/reported to regulatory veterinarian

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17
Q

Otobius spp.-Common Name

A

Argasids (soft tick)

Spinose ear tick

18
Q

Otobius spp.-Hosts

A

Livestock, humans, dogs

19
Q

Otobius spp.-Identification

A

Mouthparts not visible from dorsal surface, integument with short sharp spines

20
Q

Otobius spp.-Life Cycle

A

ELNA
Larvae and Nymphs on the host in the ear
Adults in the barn–>must treat the barn!
Larvae and nymphs are “taxi-ed” long distaces

21
Q

Otobius spp.-Site of Infection

A

Larvae and nymphs in ears

Adults are nonparasitic

22
Q

Otobius spp.-Pathogenesis and Lesions/Clinical Signs

A

Large numbers of ticks can cause severe inflammation and rupture ear drum, anemia, loss of conditions

23
Q

Otobius spp.-Treatment and Prevention

A

Topical use of acaricidal application in ear canals, treat premises

24
Q

Otobius spp.-Diagnosis

A

Id tick

25
Q

Sarcoptes scabiei-Common Name

A

Sarcoptic mange mite, itch mite, neck and tail mite

26
Q

Sarcoptes scabiei-Hosts

A

All domestic animals and humans–>largely host specific

*Zoonosis

27
Q

Sarcoptes scabiei-Identification

A

Round, 500um, short legs

28
Q

Sarcoptes scabiei-Life Cycle

A

ELNA
Tunnel in the epidermis, resurface and burrow again
Entirely on host

29
Q

Sarcoptes scabiei-Site of Infection

A

Epidermal layers of skin

30
Q

Sarcoptes scabiei-Pathogenesis and Lesions/Clinical Signs

A

Potentially most severe cattle mange
Mild infection–scaly skin
Severe infection–thickened skin, downgrading of hides, drop in meat and milk production

31
Q

Sarcoptes scabiei-Diagnosis

A

Skin scraping

32
Q

Sarcoptes scabiei-Treatment and Prevention

A

MCLs, eprinomectin approved for lactating dairy cattle

MUST be reported to authorities

33
Q

Chorioptes bovis-Common Name

A

Chorioptic mange mite

34
Q

Chorioptes bovis-Hosts

A

Cattle, small ruminants, equids

35
Q

Chorioptes bovis-Identification

A

Rounded mouthparts, sucker shape at end of stalks

36
Q

Chorioptes bovis-Life Cycle

A

ELNA

Non-burrowing, feeds on skin surface and epithelial debris, Female lives 4-6wks and lays about 90 eggs

37
Q

Chorioptes bovis-Site of Infection

A

Tailhead, udder and legs

38
Q

Chorioptes bovis-Pathogenesis and Lesions/Clinical Signs

A

Late winter, mild condition

Damages hides

39
Q

Chorioptes bovis-Diagnosis

A

Skin scraping

40
Q

Chorioptes bovis-Treatment and Prevention

A

MCLs in lactating dairy cattle

Standard louse treatments

Parasitology (16 decks)

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